Owner s Guide and Installation Instructions

Transcription

1 Owner s Guide and Installation Instructions Rheem Pronto Instantaneous Gas Water Heater 834 Series 012, 016 Models This water heater must be installed and serviced by a qualified person. Please leave this guide with the householder.

2 Warning: Upon completion of the installation and commissioning of the water heater, leave this guide with the householder or a responsible officer. DO NOT leave this guide inside of the cover of the water heater, as it may interfere with the safe operation of the water heater or ignite when the water heater is turned on. PATENTS This water heater may be protected by one or more patents or registered designs in the name of Rheem Australia Pty Ltd or Paloma Co., Ltd. TRADEMARKS Registered trademark of Rheem Australia Pty Ltd. Trademark of Rheem Australia Pty Ltd. Note: Every care has been taken to ensure accuracy in preparation of this publication. No liability can be accepted for any consequences, which may arise as a result of its application.

3 CTENTS HOUSEHOLDER - We recommend you read pages 4 to 12. The other pages are intended for the installer but may be of interest. About Your Water Heater... 4 Water Supplies Save A Service Call Installation Water Heater Connections Plumbing Wiring Diagram Commissioning Draining The Water Heater Warranty

4 ABOUT YOUR WATER HEATER WATER HEATER APPLICATI This water heater is designed for use in a single family domestic dwelling for the purpose of heating potable water. Its use in an application other than this may shorten its life. This water heater is not suitable for pool heating, or as part of hot water circulation flow and return system, or as an in-series booster for a solar water heater, and MUST NOT be used for these applications. MODEL TYPE The Rheem instantaneous gas water heater model you have chosen is for outdoor installation only. This model has a manufacturer s warranty (refer to the Rheem warranty on page 27). The water heater has a maximum preset outlet temperature setting of 60 C. This 834 series water heater is fitted with: A hydro-electric generator which provides power to operate the electronic system. An external electrical power source is not required. Electronic ignition Electronic temperature control Manual seasonal water flow adjustment valve as a supplementary control to compensate for seasonal variations in mains water supply temperature Cold start-up energy saving and water saving functions Electronic overheat protection Over-temperature cut-off device Inlet water strainer Overpressure relief valve Self-diagnosis function. WATER HEATER OPERATI The water heater operates automatically, heating water as it passes through the water heater. When a hot tap is opened, the gas burners ignite to provide immediate heating of the water. A green LED will illuminate when the water heater is operating. The heat produced by the burner is transferred to the water through the heat exchanger. The water is heated to the preset outlet temperature by the automatic adjustment of the gas supply to the burner to suit the water flow rate. The gas burners extinguish when the hot tap is closed. Automatic safety controls are fitted to the water heater to provide safe and efficient operation. Notes For areas that may experience very cold mains water temperature in winter, it may be necessary to set the seasonal water flow adjustment valve (located at the underside of the water heater) to the Winter position to reduce the risk of insufficient heating of the water. Reset the seasonal water flow adjustment valve to the Summer or another intermediate position as the mains water supply becomes warmer. It is recommended to use water saving shower heads and tap ware with this water heater. This will not only reduce water usage, but also assist with temperature control in winter and temperature fluctuation caused by simultaneous water draw off from other taps. For areas with a lower mains water pressure supply, it is advisable to set the seasonal water flow adjustment valve to the Summer position only. This will minimise water flow restriction through the water heater. green LED illuminates when heating water flow adjustment valve (manual seasonal adjustment) 4

5 ABOUT YOUR WATER HEATER MAINS PRESSURE The water heater is designed for direct connection to the mains water supply. If the mains supply pressure in your area exceeds that shown on page 15, a pressure limiting valve must be fitted. The supply pressure should be greater than 140 kpa for the rated flow and performance to be achieved. Note: It is not recommended this water heater be installed with a low pressure water supply. REDUCED HOT WATER FLOW WHEN HEAT EXCHANGER IS COLD At a cold start-up, i.e. when the water heater has not operated for some time (which is most often first thing in the morning), the initial flow of hot water may be reduced for a period of 5-10 seconds while the heat exchanger warms up. This is both an energy and water saving feature of this water heater. Once the heat exchanger has warmed up the hot water flow will increase and remain at normal flow levels. This feature will only occur at a cold start-up and not when the heat exchanger is already warm from a recent use of hot water. HOW HOT SHOULD THE WATER BE? The water heater heats the water to the preset outlet temperature setting. The factory preset outlet temperature setting of the 834 series water heater is 60 C. Note: The preset outlet temperature setting of this water heater cannot be adjusted by the householder. The setting can only be adjusted by the installer, Rheem Service or their nearest Accredited Service Agent. HOTTER WATER INCREASES THE RISK OF SCALD INJURY This water heater can deliver water at temperatures which can cause scalding. Check the water temperature before use, such as when entering a shower or filling a bath or basin, to ensure it is suitable for the application and will not cause scald injury. We recommend and it may be required by regulations that an approved temperature limiting device be fitted into the hot water piping to the bathroom and ensuite when an 834 series water heater is installed. This will keep the water temperature below 50 C at the bathroom and ensuite. The risk of scald injury will be reduced and if the preset outlet temperature setting has not been adjusted below 60 C, still allow hotter water to the kitchen and laundry. maximum and factory preset outlet temperature setting maximum recommended supply temperature to bathrooms and ensuites SAFETY This water heater is supplied with a temperature sensor, over-temperature cut-off device and a pressure relief valve. These devices must not be tampered with or removed. The water heater must not be operated unless each of these devices is fitted and is in working order. The Rheem warranty may not cover faults if relief valves or other safety devices are tampered with or if the installation is not in accordance with these instructions. 5

6 ABOUT YOUR WATER HEATER WARNINGS This water heater is only intended to be operated by persons who have the experience or the knowledge and the capabilities to do so. This water heater is not intended to be operated by persons with reduced physical, sensory or mental capabilities i.e. the infirm, or by children. Children should be supervised to ensure they do not interfere with the water heater. For continued safety of this water heater it must be installed, operated and maintained in accordance with the Owner s Guide and Installation Instructions. Do not modify this water heater. Do not use or store flammable materials in or near this water heater. Flammable liquids (such as petrol), combustible materials (such as newspapers) and similar articles must be kept well away from the water heater and the flue terminal. Do not spray aerosols in the vicinity of this water heater while it is in operation. Gases from some aerosol sprays become corrosive when drawn into a flame. Do not store swimming pool chemicals, household cleaners, etc., near the water heater. Do not place articles on or against this water heater, or in contact with the flue terminal. Ensure the flue terminal is not obstructed in any way at any time. Do not use Propane / Butane gas mixtures in a Propane model. A Propane model is designed to operate on Propane only. The use of Propane / Butane mixture, such as automotive LP gas fuel, in a Propane model is unsafe and can cause damage to the water heater. PRECAUTIS The water heater must be maintained in accordance with the Owner s Guide and Installation Instructions. Refer to General Maintenance on page 6, Minor Maintenance Every Six Months on page 7 and Major Service Every Five Years on page 7. If this water heater is to be used where an uninterrupted hot water supply is necessary for your application or business you should ensure that you have back-up redundancy within the hot water system design. This should ensure the continuity of hot water supply in the event that this water heater were to become inoperable for any reason. We recommend you seek advice from your plumber or specifier about your needs and building backup redundancy into your hot water supply system. GENERAL MAINTENANCE The jacket of the water heater can be cleaned with a soft cloth and warm mild soapy water. Under no circumstances should abrasive materials or powders be used. The area around the water heater can be sprayed with insecticide to rid the area of insects. Insects encroaching into or nesting in the water heater can interfere with the operation of the water heater and also damage components. It is recommended to turn off the cold water isolation valve to the water heater prior to performing general maintenance. This will prevent the water heater from being used while you clean or spray around the water heater. Turn on the cold water isolation valve when finished performing the general maintenance. Warning: Do not spray the water heater with insecticide while the water heater is running. Propellants in insect spray may contain hydrocarbon which can catch fire. 6

7 ABOUT YOUR WATER HEATER MINOR MAINTENANCE EVERY SIX MTHS This can be performed by the dwelling occupant. It is recommended to turn off the cold water isolation valve to the water heater prior to performing general maintenance. This will prevent the water heater from being used while you clean or spray around the water heater. Turn on the cold water isolation valve when finished performing the general maintenance. The minor maintenance includes: Inspect around the air inlet, flue terminal and the water heater in general for plant growth. Trim back any shrubs, bushes or other plants which have encroached around the water heater. Plant growth across the air inlet and flue terminal can interfere with the performance of the water heater. Inspect around the water heater for insect infestations, such as ants. Spray insecticide around the water heater if necessary to rid the area of insects. Do not spray the surface or into the air inlet or flue terminal of the water heater. Insects encroaching into or nesting in the water heater can interfere with the operation of the water heater and also damage components. Warning: Do not spray the water heater with insecticide while the water heater is running. Propellants in insect spray may contain hydrocarbon which can catch fire. MAJOR SERVICE EVERY FIVE YEARS For safe and efficient operation, it is recommended a major service be conducted on the water heater every five years. Warning: Servicing of a water heater must only be carried out by qualified personnel. Phone Rheem Service or their nearest Accredited Service Agent. Note: The major service and routine replacement of any components, if required, are not included in the Rheem warranty. A charge will be made for this work. Only genuine replacement parts should be used on this water heater. The major service includes the following actions: Remove and clean cold water inlet strainer. Check and if necessary adjust the gas pressure. Check the operation of and clean the burner and heat exchanger. Visually check the unit for any potential problems. Inspect all connections. TO TURN OFF THE WATER HEATER If it is necessary to turn off the water heater: Close the gas isolation valve at the inlet to the water heater. Close the cold water isolation valve at the inlet to the water heater. Note: This water heater does not have a frost protection system. If there is a risk of freezing conditions, the water heater must be drained, otherwise damage could result (refer No Frost Protection on page 8 and Draining the Water Heater on page 8). 7

8 ABOUT YOUR WATER HEATER TO TURN THE WATER HEATER Screw in the drain plugs at the cold water inlet and hot water outlet of the water heater if the water heater has been drained. Open all of the hot taps in the house (don t forget the shower). Open the cold water isolation valve fully at the inlet to the water heater. Air will be forced out of the taps. Close each tap as water flows freely from it. Open the gas isolation valve fully at the inlet to the water heater. The water heater will operate automatically when you open a hot tap. GOING HOLIDAYS If you are going on holidays, it is not necessary to turn the water heater off. If it is necessary to turn off the water heater, refer to To Turn Off The Water Heater on page 7. NO FROST PROTECTI The water heater is NOT fitted with a frost protection system. If there is a risk of freezing, then it is necessary to drain the water heater (refer to Draining the Water Heater on page 8). Notes: Damage caused by freezing is not covered by the Rheem warranty (refer to Terms of the Rheem Warranty on page 27). Pipe work to and from the water heater must be adequately insulated to prevent freezing. DRAINING THE WATER HEATER Turn off the water heater (refer to Turn Off The Water Heater on page 7). Open a hot tap (preferably the shower outlet). Unscrew the two drain plugs, one each at the cold water inlet and hot water outlet, on the underside of the water heater. Water will drain from the water heater. When water stops flowing from the water heater, close the hot tap. Note: It is recommended not to screw the drain plugs back in, until the water heater is to be turned on again. 8

9 HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY? Installation requirements are shown on pages 13 to 18. The water heater must be installed: ABOUT YOUR WATER HEATER by a qualified person, and in accordance with the installation instructions, and in compliance with Standards AS/NZS , and either AS 5601 or AS/NZS as applicable under local regulations, and all local codes and regulatory authority requirements. VICTORIAN CUSTOMERS Notice to Victorian Customers from the Victorian Plumbing Industry Commission. This water heater must be installed by a licensed person as required by the Victorian Building Act Only a licensed person will give you a Compliance Certificate, showing that the work complies with all the relevant Standards. Only a licensed person will have insurance protecting their workmanship for 6 years. Make sure you use a licensed person to install this water heater and ask for your Compliance Certificate. DOES THE WATER CHEMISTRY AFFECT THE WATER HEATER? The water heater is suitable for most public water supplies, however some water chemistries may have detrimental effects on the water heater, its components and fittings. Refer to Water Supplies on page 10. If you are in a known harsh water area or you are not sure of your water chemistry, have your water checked against the conditions described on page 10. HOW LG WILL THE WATER HEATER LAST? The water heater is supported by a manufacturer s warranty (refer to page 27). There are a number of factors that will affect the length of service the water heater will provide. These include but are not limited to the water chemistry, the water pressure, the water temperature (inlet and outlet) and the water usage pattern. Refer to Precautions on page 6. 9

10 WATER SUPPLIES This water heater must be installed in accordance with this advice to be covered by the Rheem warranty. This water heater is manufactured to suit the water conditions of most public reticulated water supplies. However, there are some known water chemistries which can have detrimental effects on the water heater and its operation and / or life expectancy. If you are unsure of your water chemistry, you may be able to obtain information from your local water supply authority. This water heater should only be connected to a water supply which complies with these guidelines for the Rheem warranty to apply. CHANGE OF WATER SUPPLY The changing or alternating from one water supply to another can have a detrimental effect on the operation and / or life expectation of a heat exchanger in an instantaneous water heater. Where there is a changeover from one water supply to another, e.g. a rainwater tank supply, bore water supply, desalinated water supply, public reticulated water supply or water brought in from another supply, then water chemistry information should be sought from the supplier or it should be tested to ensure the water supply meets the requirements given in these guidelines for the Rheem warranty to apply. SATURATI INDEX The saturation index (SI) is used as a measure of the water s corrosive or scaling properties. The saturation index figures stated are calculated using a water temperature of 80 C. In a corrosive water supply, the water can attack copper parts and cause them to fail. Where the saturation index is less than 1.0, the water is very corrosive and the Rheem warranty does not apply to a copper heat exchanger in a continuous flow water heater. In a scaling water supply calcium carbonate is deposited out of the water onto any hot metallic surface. Where the saturation index exceeds +0.80, the Rheem warranty does not apply to a copper heat exchanger in an instantaneous water heater. Water which is scaling may be treated with a water softening device to reduce the saturation index of the water. Refer to the Saturation Index chart on page 10. SATURATI INDEX (SI) GAS CTINUOUS FLOW WATER HEATERS no warranty applies to a: -continuous flow copper heat exchanger WITHIN WARRANTY SPECIFICATI no warranty applies to a: -continuous flow copper heat exchanger very corrosive SATURATI INDEX 80 C water temperature) corrosive scaling very scaling 10

11 SAVE A SERVICE CALL Check the items below before making a service call. You will be charged for attending to any condition or fault, which is not related to manufacture or failure of a part (refer to Terms of the Rheem Warranty on page 27). COLD WATER FROM THE HOT TAP Close the hot tap, wait 10 seconds and open the hot tap again. Is the hot tap open enough or is the water flow rate too low? The burners will not light if the flow rate is less than 3.0 L / min. The cold water inlet strainer may require cleaning. Is the isolation valve in the gas line open? Is there a gas supply to the rest of the house? Try lighting another gas appliance. Has the gas line been purged of air after installation? Refer to your plumber. WATER IS NOT HOT ENOUGH Is the seasonal water flow adjustment valve set to an inappropriate setting? Set to the Winter position. WATER FLOW OR TEMPERATURE FLUCTUATES More than one tap in use at the same time may cause a decrease in the hot water flow or a fluctuation in hot water temperature from the taps. Is more than one tap open, or is an appliance such as a dishwasher or washing machine, in use at the same time? Ensure only one tap or appliances is on at the one time. Is one outlet (especially the shower) using more hot water than you think? Check the flow of the water from one tap, e.g. the shower. The shower should be adjusted so the hot tap is fully open. Installing water saving shower heads and tap ware or a flow control valve to each hot water outlet can reduce water flow and temperature fluctuation. Do you have the correct size water heater for your requirements? The sizing guide in the sales literature and on the Rheem website ( suggests average sizes that may be needed. REDUCED HOT WATER FLOW WHEN HEAT EXCHANGER IS COLD At a cold start-up, i.e. when the water heater has not operated for some time (which is most often first thing in the morning), the initial flow of hot water may be reduced for a period of 5-10 seconds while the heat exchanger warms up. This is both an energy and water saving feature of this water heater. Once the heat exchanger has warmed up the hot water flow will increase and remain at normal flow levels. This feature will only occur at a cold start-up and not when the heat exchanger is already warm from a recent use of hot water. NO WATER FROM THE HOT TAP No flow of water from the hot tap may indicate a restriction in or failure of the cold water supply to the water heater. Check for water flow at other taps and that the cold water isolation valve (refer to page 20) is fully open. 11

12 SAVE A SERVICE CALL CLOUDS OF WHITE VAPOUR FROM THE FLUE TERMINAL During the heating cycle, it is not unusual to see water vapour clouds steaming from the flue terminal, particularly on cold or humid days. This is normal operation of the water heater. PRESSURE RELIEF VALVE DISCHARGING A pressure relief valve is incorporated into the water heater controls. This valve protects the water heater, by allowing water to escape, in the event of excessive pressure build-up in the waterways. Normal operation A small volume of water may discharge from the bottom of the water heater when a hot tap is suddenly closed. Continuous dribble A continuous dribble may indicate the water supply pressure is above the design pressure for the water heater. If so, a pressure limiting valve must be installed on the cold water supply pipe to the water heater (refer to Mains Water Supply on page 15). ERROR CODE The water heater provides a diagnostic error code in the event of an interruption to its operation. The error code is displayed on the indication window on the front of the water heater as a flashing red LED whilst the hot tap is open. If the red LED is flashing: Close the hot tap. Check the gas isolation valve at the gas inlet to the water heater is fully open. Wait 5 minutes, then open a hot tap. If the error code persists, count the number of flashes and then turn off the hot tap. Phone Rheem Service or their nearest Accredited Service Agent to arrange for inspection. HIGHER THAN EXPECTED GAS BILLS Should you at any time, feel your gas bill is higher than expected, we suggest you check the following points: Is one outlet (especially the shower) using more hot water than you think? Carefully review the family s hot water usage. Inexpensive flow control valves can be easily fitted to the shower outlets to reduce water usage. Has there been an increase in hot water usage? An increase in hot water usage will result in an increase in water heater operation. Has your water heating tariff rate been increased by your gas retailer since your previous bill? IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU NEED ASSISTANCE, PHE RHEEM SERVICE OR THEIR NEAREST ACCREDITED SERVICE AGENT. 12

13 INSTALLATI WATER HEATER THIS WATER HEATER IS FOR OUTDOOR INSTALLATI LY. THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING. Check the water heater is suitable for the gas type available. (refer to the rating label on the water heater) INSTALLATI STANDARDS The water heater must be installed: by a qualified person, and in accordance with the installation instructions, and in compliance with Standards AS/NZS , and either AS 5601 or AS/NZS as applicable under local regulations, and all local codes and regulatory authority requirements. All packaging materials must be removed from the water heater prior to its installation. WATER HEATER APPLICATI This water heater is designed for use in a single family domestic dwelling for the purpose of heating potable water. Its use in an application other than this may shorten its life. This water heater is not suitable for pool heating, or as part of hot water circulation flow and return system, or as an in-series booster for a solar water heater, and MUST NOT be used for these applications. If this water heater is to be used where an uninterrupted hot water supply is necessary for the application or business, then there should be back-up redundancy within the hot water system design. This should ensure the continuity of hot water supply in the event that this water heater was to become inoperable for any reason. We recommend you provide advice to the system owner about their needs and building back-up redundancy into the hot water supply system. WATER HEATER LOCATI The water heater is suitable for outdoor installation only and should be installed close to the most frequently used outlet and its position chosen with safety and service in mind. Make sure people (particularly children) will not touch the flue terminal. The flue terminal and air inlet must be clear of obstructions and shrubbery. Clearance must be allowed for servicing of the water heater. The water heater must be accessible without the use of a ladder or scaffold. Make sure the entire front panel can be removed for service. You must be able to read the information on the rating plate. Remember you may have to take the entire water heater out later for servicing. This water heater must be installed vertically upright with the water and gas connections on the underside, pointing toward the ground. The back of the water heater can be either against a wall or supported by a frame. If the water heater is fitted on a wall of combustible material, the wall must be protected by a fire resistant heat shield. Refer to Heat Shield on page 16 for the size and location of the heat shield. Note: The water heater must be well secured to the wall or frame using two fasteners at the top and one fastener at the bottom of the unit (refer to page 18 for mounting hole positions and weight of the water heater). Use the screws provided only if they are suitable for the wall or frame type. Otherwise select and use alternative fasteners suitable for the application. The fasteners must be capable of bearing the full weight of the water heater so it may not work loose nor impose any load on the gas and water pipe work connected to the water heater. Refer to the fastener manufacturer s information and recommendations for the type of fastener to use for the wall or frame type and load bearing requirements. 13

14 INSTALLATI WATER HEATER The water heater must not be installed in an area with a corrosive atmosphere where chemicals are stored or where aerosol propellants are released. Remember the air may be safe to breathe, but when it goes through a flame, chemical changes take place which may attack the water heater. A secondary flue is not required. The water heater must not be installed indoors or in a confined space. The water heater must be located to ensure that the location of the flue terminal complies with the requirements of AS 5601 or AS/NZS , as applicable under local regulations. As a guide the following requirements are extracted from the Gas Installations Standard. The distances are measured along the wall behind the water heater. At least 500 mm between the top of the flue terminal and the eaves. At least 500 mm between the flue terminal and the edge of any opening into the building, such as an openable door or window, measured horizontally*. At least 1000 mm between the top of the flue terminal and the edge of any opening into the building, such as an openable window, measured vertically. At least 500 mm between the flue terminal and a return wall or external corner, measured horizontally*. At least 500 mm between the flue terminal and any opening into a building, in the direction of the flue discharge. 500 MIN 500 MIN 500 MIN At least 500 mm between the flue terminal and a fence, wall or other obstruction, in the direction of the flue discharge. Note: * If these horizontal distances cannot be achieved, AS/NZS states an equivalent horizontal distance measured diagonally from the nearest discharge point of the flue terminal to the opening may be deemed to comply. Check with the local regulator. NO FROST PROTECTI The water heater is NOT fitted with a frost protection system. If there is a risk of freezing, then it is necessary to drain the water heater (refer to Draining the Water Heater on page 26). Damage caused by freezing is not covered by the Rheem warranty (refer to Terms of the Rheem Warranty on page 27). Damage to the water heater caused by freezing of the pipe work to or from the water heater is not covered under the Rheem warranty. Refer to AS/NZS for precautions to be taken for installations in frost prone areas. The cold water line to the water heater must be insulated with suitable thickness insulation if freezing conditions are likely to occur. The insulation must be fitted to the underside of the water heater and be weatherproof and UV resistant if exposed. REDUCING HEAT LOSSES The cold water line to and hot water line from the water heater must be insulated in accordance with the requirements of AS/NZS to. The insulation must be weatherproof and UV resistant if exposed. The insulation must be fitted up to the connections on the underside of the water heater. 14

15 INSTALLATI WATER HEATER MAINS WATER SUPPLY Where the mains water supply pressure exceeds that shown in the table below, an approved pressure limiting valve that does not have non-return valve characteristics (such as an RMC PSL series valve) is required and should be fitted as shown in the installation diagram (refer to page 20). Model Relief valve setting 1000 kpa 1000 kpa Max. mains supply pressure 800 kpa 800 kpa Min. mains supply working pressure * 120 kpa 140 kpa * minimum water supply working pressure required to achieve the rated flow and performance Notes: It is not recommended to install this water heater with a low pressure water supply. A minimum water supply working pressure of 140 kpa for 016 models and 120 kpa is required for 012 models, i.e. whilst water is flowing through the water heater, is required to achieve the rated flow and performance of the water heater. If sludge or foreign matter is present in the water supply, it is recommended a suitable filter be incorporated in the cold water line to the water heater. This water heater is not suitable for connection to bore water or spring water unless a water treatment device is fitted. Refer to Water Supplies on page 10 for further information on water chemistry. 15

16 INSTALLATI WATER HEATER HEAT SHIELD If the water heater is installed on a wall of combustible material, the wall must be protected by a heat shield. The minimum dimensions of the heat shield are 850 mm wide x 400 mm high. If a metal plate is used, its minimum thickness must be 0.8 mm and when installed must provide air gaps on both the front face between the flue terminal and heat shield and on the rear face between the wall and the heat shield. A 9 mm air gap is recommended between the rear face of the heat shield and the wall surface to enable natural convective cooling of the wall surface. Refer to the Heat Shield Dimensions and Position diagram no page 16. A heat shield is available from Rheem (PN ) as an accessory. Notes: If the installation is on an uneven wall surface, ensure a metal plate heat shield is NOT in contact with the wall surface. In some situations, it may be necessary to fix a backing plate onto the wall to even out the wall surface. The heat shield would then mount to the backing plate. Ensure the air gap between the heat shield and the wall surface or backing plate (if one is installed) is kept clear, allowing natural ventilation. 850mm* 245mm* BOTTOM EDGE OF SHIELD MUST BE EXTENDED PAST THE LOWER EDGE OF FLUE OUTLET GRILLE = = 400mm* 20mm* HEAT SHIELD FOR USE WHEN MOUNTING THE WATER HEATER A COMBUSTIBLE SURFACE APPROXIMATELY 188mm (012 MODEL), OR 225mm (016 MODELS) FROM MOUNTING HOLE NOTE: * MINIMUM DIMENSIS Heat Shield Dimensions and Position 16

17 HOT WATER DELIVERY This water heater can deliver water at temperatures which can cause scalding. INSTALLATI WATER HEATER It is necessary and we recommend that a temperature limiting device be fitted between an 834 series water heater and the hot water outlets in any ablution and public areas such as a bathroom, ensuite or public amenities, to reduce the risk of scalding. The installing plumber may have a legal obligation to ensure the installation of this water heater meets the delivery water temperature requirements of AS/NZS so that scalding water temperatures are not delivered to a bathroom, ensuite or other ablution or public area. The temperature limiting device must be of a type suitable for use with an instantaneous gas water heater and should have: a specified minimum temperature differential between the hot water inlet and the tempered water outlet of no greater than 10 C, and a specified maximum permitted pressure variation in the supply between the hot water inlet and the cold water inlet of no less than 15%. Refer to the specifications of the temperature limiting device. Where a temperature limiting device is installed adjacent to the water heater, the cold water line to the temperature limiting device can be branched off the cold water line either before or after the isolation valve and pressure limiting valve to the water heater. If a pressure limiting valve is installed on the cold water line to the water heater and the cold water line to a temperature limiting device branches off before this valve or from another cold water line in the premises, then a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting device. Two Temperature Zones Using a Temperature Limiting Device 17

18 INSTALLATI WATER HEATER DIMENSIS AND TECHNICAL DATA A G H HOT WATER OUTLET D E B GAS INLET (FLUSH TO BASE) (12L LY) 5 COLD WATER INLET 222 M L R3.5 R8 HOT WATER OUTLET 69 K GAS INLET COLD WATER INLET DIMENSIS DIAGRAM MECHANICAL INSTANTANEOUS 843 SERIES Model Rated delivery (@ 40 C rise) Recovery (@ 25 C rise) litres / min litres / min Mass Empty (unpackaged) kg Dimensions A B D E G H K L M mm mm Gas Details Hourly Gas Consumption (MJ) Minimum Gas Pressure (kpa) Test Point Gas Pressure (kpa) minimum maximum Maximum Gas Pressure (kpa) Injector Size (mm) Pilot Injector (mm) Size , , , 016 Natural x x Propane x x Model numbers: N = Natural, P = Propane, to denote gas type. Letter N or P is included in the model number, e.g N0. Character following gas type letter, 0 = no frost protection. Technical data is subject to change. 18

19 INSTALLATI WATER HEATER TYPICAL INSTALLATI OUTDOOR LOCATI 19

20 CNECTIS PLUMBING All plumbing work must be carried out by a qualified person and in compliance with the Standard AS/NZS and all local codes and regulatory authority requirements. All gas work must be carried out by a qualified person and in compliance with the Standard AS 5601 or AS/NZS , as applicable under local regulations, and all local codes and regulatory authority requirements. Note: The water heater is fitted with a gas pressure regulator preset to the gas type of the water heater. There is no need to install an additional gas pressure regulator unless the gas supply pressure exceeds 3.5 kpa. CNECTI SIZES Model Hot water connection R 1/2 R 1/2 Cold water connection R 1/2 R 1/2 Gas inlet connection Rp 3/4 Rp 3/4 WATER INLET AND OUTLET All pipe work must be cleared of foreign matter before connection and purged before attempting to operate the water heater. All olive compression fittings must use brass or copper olives. Use an approved thread sealant such as Teflon tape on all threaded joints. A full flow gate valve or ball valve must be installed on the cold water line to the water heater. A non-return valve or stop tap must not be installed. An acceptable arrangement is shown in the diagram. Refer also to Hot Water Delivery on page 17 and to Mains Water Supply on page 15. A disconnection union must always be provided at the cold water inlet and hot water outlet on the water heater to allow for disconnection of the water heater. 843 SERIES Insulation used on the cold and hot water lines must extend up to the cold water inlet and hot water outlet of the water heater. Notes: HOT WATER PRESSURE LIMITING VALVE (PSL TYPE) GAS COCK GAS NATURAL / PROPANE GAS PRESSURE REGULATOR IS FACTORY - FITTED INSIDE GATE VALVE OR BALL VALVE COLD WATER COLD & HOT WATER Gas Water & GAS Heater CNECTI DETAILS Cold and MECHANICAL Hot Water and INSTANTANEOUS Gas Connection Details It is essential all pipe connections be correctly aligned, otherwise component connections within the water heater may be strained and / or components themselves misaligned. It is recommended also, wherever possible, pipe connections be made at the water heater first and final pipe runs be made in soft copper pipe to allow some adjustment for misalignment. Use the spanner flats on the water heater fittings and take care to avoid twisting the water inlet and outlet pipes inside the jacket. PIPE SIZES The pipe sizing for hot water supply systems should be carried out by persons competent to do so, choosing the most suitable pipe size to ensure adequate flow for each individual application. Reference to the technical specifications of the water heater and local regulatory authority requirements must be made. To achieve true mains pressure operation, the cold water line to the water heater should be the same size or bigger than the hot water line from the water heater. The minimum recommended cold pipe and hot pipe size is DN15. 20

21 CNECTIS PLUMBING GAS INLET The gas connection is made at the underside of the water heater. The pipe work must be cleared of foreign matter before connection and purged before attempting to operate the water heater. An isolation valve and disconnection union must be installed to allow servicing and removal of the water heater (refer to the diagram on page 20). Note: Refer to the Gas Installations Standard AS 5601 or AS/NZS for the correct method of sizing the gas supply pipe to the water heater. The pipe size selection must take into account the high gas input of this water heater (refer to table on page 18) as well as all of the other gas appliances in the premises. Warning: Always isolate the water heater before pressure testing the gas supply system. Disconnect the water heater after the isolation valve to prevent the risk of serious damage to the gas control. The Rheem warranty does not cover damage of any nature resulting from failure to observe this precaution. Refer to rating label for gas types and pressures. WIRING DIAGRAM DIP FLAME ROD BK BK IGNITER ELECTRODE STATE OFF STATE OFF SW 1 DIP SWITCH SETTING SW 2 SW 3 OFF OFF OFF SW 4 SW 5 SW 6 I / D 12 L PROPANE O / D 16 L NATURAL S IGNITI MODULE SW 7 SW 8 SET TEMP OFF OFF 45 OFF OVER TEMPERATURE CUT OUT SWITCH OFF 60 TO CHASSIS / GAS VALVE BK R BR O GR BK R O O R WATER FLOW SENSOR OUTLET HW THERMISTOR BK BK GR SV2 MAIN GAS VALVE PILOT GAS VALVE GR R O BK SV3 MASV GAS VALVE TO CHASSIS ( INTERNALLY CNECTED TO GAS VALVE ) DIP SV1 O TO CHASSIS ( INTERNALLY CNECTED TO GAS VALVE ) Min Max FAULT (RED ) (GREEN) DC 3.7V Rechargeable Battery Only # _ COLOUR CODE TEMPERATURE CTROLLER + R : RED W : WHITE BR : BROWN BK : BLACK GR : GREEN O : ORANGE Y : YELLOW W W W V WATER THROTTLING VALVE R BK G HYDRO- ELECTRIC GENERATOR # REPLACEMENT BATTERY IS AVAILABLE FROM RHEEM SERVICE Wiring Diagram 834 Series Water Heater 21

22 COMMISSIING All water heaters are tested and adjusted before dispatch from the factory, however further adjustments may become necessary because of local conditions. TO TURN THE WATER HEATER Open all of the hot taps in the house (don t forget the shower). Open the cold water isolation valve fully at the inlet to the water heater. Air will be forced out of the taps. Close each tap as water flows freely from it. Check the pipe work for leaks. Open the gas isolation valve fully. Check the gas pipe work for leaks. Open a hot tap. The water heater will operate automatically. Check to ensure the flow from each connected hot tap is sufficient to operate the water heater. The minimum operating flow rate for all models is 3.0 litres per minute. Check and if required adjust the preset outlet temperature setting of the water heater. Refer to Preset Outlet Temperature Setting on page 25. Set the seasonal water flow adjustment valve (located at the underside of the water heater) to the Summer position. Upon completion of the installation, it may be necessary to set the seasonal water flow adjustment valve to another more appropriate position to suit the time of the year and incoming cold water temperature. water flow adjustment valve (manual seasonal adjustment) To complete the installation, it is necessary to check the gas supply pressure at the inlet to the water heater (refer to Inlet Gas Pressure on page 22), the minimum test point pressure and the maximum test point pressure (refer to Burner Gas Pressure on page 24). Explain to the householder or a responsible officer the functions and operation of the water heater. Warning: Upon completion of the installation and commissioning of the water heater, leave this guide with the householder or a responsible officer. DO NOT leave this guide inside of the cover of the water heater, as it may interfere with the safe operation of the water heater or ignite when the water heater is turned on. INLET GAS PRESSURE IMPORTANT CHECK the gas supply pressure at the inlet to the water heater with the water heater and all other gas burning appliances in the premises operating (burners alight). The minimum gas supply pressure is: Natural Gas 1.13 kpa Propane 2.75 kpa If this minimum cannot be achieved, it may indicate the meter or the gas line to the water heater is undersized. It is important to ensure that an adequate gas supply pressure is available to the water heater when other gas burning appliances, on the same gas supply, are operating. Note: The maximum gas supply pressure shall not exceed 3.5 kpa. A gas pressure regulator shall be installed upstream to the water heater if the gas supply pressure may exceed this value. Damage to the water heater due to high gas pressure is not cover by the Rheem warranty. 22

23 COMMISSIING Inlet Gas Pressure Test Point To check the inlet gas pressure: 1. Close any hot taps and ensure the burner is not operating. 2. Close the gas isolation valve at the gas inlet to the water heater. 3. Remove the screws holdings the front cover to the jacket. 4. Gently disengage the front panel and pull downward to remove from the water heater. 5. Locate the inlet gas pressure test point on the gas valve of the water heater. Loosen the test point screw so that the test point orifice is not blocked. Connect the manometer. 6. Open the gas isolation valve fully at the gas inlet to the water heater. 7. Turn on all other gas burning appliances in the house which are on the same gas supply. 8. Open a hot tap fully and ensure the burner is fully ignited. It may be necessary to open a second tap to allow the water heater to operate at full capacity and enable the burners to fully ignite. 9. Observe the gas pressure reading on the manometer. INLET GAS PRESSURE TEST POINT If the manometer reading is between the minimum and maximum inlet gas pressure ratings on the rating label, no adjustment is required. If the manometer reading is below the minimum inlet gas pressure rating on the rating label, then either the gas pipe to the water heater is undersized and needs to be rectified or adjustment is required at the gas meter regulator. Check with the gas supply authority. If the manometer reading is above the maximum inlet gas pressure rating on the rating label, then adjustment is required at the gas meter regulator. Check with the gas supply authority. 10. Close the hot tap. 11. Turn off the other gas burning appliances in the house. 12. Close the gas isolation valve at the inlet to the water heater. 13. Remove the manometer and tighten the test point screw. 14. Open the gas isolation valve fully at the gas inlet to the water heater. 15. Open a hot tap again so the burner ignites. 16. Test for gas leaks. 17. Close the hot tap. 18. Refit the front panel to the water heater. 23

24 COMMISSIING BURNER GAS PRESSURE It is necessary to check the burner gas pressure at both the minimum and maximum operational settings. To check and if necessary adjust the operational gas pressures, the burner must be ignited and hot water must be flowing from a hot tap. Checking and Adjusting Test Point Burner Gas Pressures Refer to the rating label on the water heater for the minimum and maximum test point gas pressures. 1. Close any hot taps and ensure the burner is not operating. 2. Close the gas isolation valve at the gas inlet to the water heater. 3. Remove the screws holding the front panel to the jacket. 4. Gently disengage the front panel and pull downward to remove from the water heater. 5. Locate the burner gas pressure test point on the main burner manifold. Remove the test point screw and washer from the test point orifice. Connect the manometer. 6. Open the gas isolation valve fully at the gas inlet to the water heater. BURNER PRESSURE TEST POINT INLET GAS PRESSURE TEST POINT MANOMETER 7. Set dip switches 1, 2 and 3 to the (up) position. 8. Open a hot tap fully until the burner ignites. The burner will now operate on the minimum gas pressure setting. 9. Observe the gas pressure reading on the manometer and compare to the minimum test point gas pressure stated on the rating label. 10. If adjustment is required, using a phillips head screw driver turn the MIN dial anti-clockwise to increase the minimum burner gas pressure or clockwise to reduce the minimum burner gas pressure, whilst reading the gas pressure on the manometer. 11. When the minimum burner gas pressure is correctly adjusted, set dip switch 2 to the OFF (down) position. The burner will now operate on the maximum gas pressure setting. 12. Observe the gas pressure reading on the manometer and compare to the maximum test point gas pressure stated on the rating label. 13. If adjustment is required, using a phillips head screw driver turn the MAX dial anti-clockwise to increase the maximum burner gas pressure or clockwise to reduce the maximum burner gas pressure, whilst reading the gas pressure on the manometer. 14. When the maximum burner gas pressure is correctly adjusted, set the dip switch 1 to the OFF (down) position. 15. Wait for 1 second, then set dip switch 3 to the OFF (down) position. 16. Turn off the hot water tap. dip switch (up) position GR IGNITER dip switch OFF (down) position ELECTRODE GR O R Min & BK Max adjustment dials Min Max FAULT (RED ) SV2 SV3 DIP STATE OFF STATE OFF (GREEN) TEMPERATURE CTROLLER dip switches SW 7 SW 8 + SET TEMP SW TO CHASSIS ( INTER CNECTED TO GAS DIP MAIN GAS VALVE MASV GAS VALVE DC 3.7V Rechargeable Battery Only # _ OF SW I / O / OF OF 4 OVER # REPLACEMENT BATTERY IS 24

25 COMMISSIING 17. Close the gas isolation valve fully at the gas inlet to the water heater. 18. Remove the manometer and refit and tighten the test point screw and washer. 19. Turn on the gas isolation valve fully, open a hot water tap and check the burners ignite. 20. Check for gas leaks. 21. Turn off the hot water tap. 22. Refit the front panel to the water heater. Notes: Dip switch 3 must be set to the OFF (down) position after dip switches 1 and 2 are set to the OFF (down) position, otherwise the settings will not be saved. During the checking and adjusting of the burner gas pressures, the temperature control function is deactivated. For normal operation of the water heater, dip switches 1, 2 and 3 must be in the OFF (down) position. PRESET OUTLET TEMPERATURE SETTING The factory preset outlet temperature setting of the water heater is: 834 series 012, 016 models 60 C It is usually not necessary to adjust the factory preset outlet temperature setting of the water heater, unless the customer has a particular requirement for this to be done. Consideration must be given to the delivery temperature to any ablution and public areas such as a bathroom, ensuite or public amenities. Refer to Hot Water Delivery on page 17. To Check Or Adjust The Preset Outlet Temperature Setting The preset outlet temperature settings are: 834 series 45 C, 50 C, 60 C To check or adjust the preset outlet temperature setting: 1. Remove the screws holding the front panel to the jacket. 2. Gently disengage the front panel and pull downward to remove from the water heater. 3. Dip switches 7 and 8 on the Temperature Controller determine the preset outlet temperature setting of the water heater. Adjust the dip switches to obtain the desired setting: K 60 C set dip switch 7 to the (up) position and dip switch 8 to either the (up) or OFF (down) position. 50 C set dip switch 7 to the OFF (down) position and dip switch 8 to the (up) position. 45 C set dip switch 7 to the OFF (down) position and dip switch 8 to the OFF (down) position. 4. Refit the front panel to the water heater. WIRING DIAG SW 7 SW 8 SET TEMP BK BK dip switch (up) position GR R R dip IGNITER switch OFF (down) position GR O R O BK O ELECTRODE O O Min Max TEMPERATURE 65 FAULT 4 (RED ) CTROLLER BK BK GR GR R Min OVER TEMPERATURE CUT OUT SWITCH DIP O BK FAULT (RED ) SENSOR Max OFF OFF 45 SV2 OFF 50 WATER FLOW SENSOR MASV GA OUTLET H STATE VALVE dip switches THERMIST SV3 OFF SV2 STATE SV3 OFF (GREEN) (GREEN) SW 7 + SW 8 SET TEMP OFF 60 OF MAIN GA VALVE MASV GA VALVE TO CHASSIS ( INT DC 3.7V CNECTED Rechargeable TO G Battery Only O # / _ DIP DC 3.7V Rechargeable Battery Only # _ SW TO CHASSIS ( INTE CNECTED TO GAS DIP OUTLET HW THERMISTO MAIN GAS VALVE SW I / O O 4 25

26 COMMISSIING TO TURN OFF THE WATER HEATER If it is necessary to turn off the water heater on completion of the installation, such as on a building site or where the premises is vacant, then: Close the gas isolation valve at the inlet to the water heater Close the cold water isolation valve at the inlet to the water heater. Drain the water heater if there is a risk of freezing conditions occurring (refer to Draining The Water Heater on page 26). Notes: The 834 series water heater does not have a frost protection system. Damage caused by freezing is not covered by the Rheem warranty (refer to Terms of the Rheem Warranty on page 27). DRAINING THE WATER HEATER To drain the water heater: Turn off the water heater (refer to Turn Off The Water Heater on page 26). Open a hot tap (preferably the shower outlet). Unscrew the two drain plugs, one each at the cold water inlet and hot water outlet, on the underside of the water heater. Water will drain from the water heater. When water stops flowing from the water heater, close the hot tap. Note: It is recommended not to screw the drain plugs back in, until the water heater is to be turned on again. 26